Tong heads



FIG. 1 is a front view of tong heads showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a right side view thereof, the left side view being a mirrorimage;

FIG. 4 is a back view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines shown in the drawings represent portions of the tongheads that form no part of the claimed design.

The ornamental design for tong heads, as shown and described.